Products missing components or broken on arrival

I have ordered products from Amazon South Africa for a while now. The last 2 orders that I places were delivered in good time. BUT! The first product had the main component missing - the packet had been sliced open and the working component was missing. The second product was sent as a totally different brand than what was ordered. It was broken and parts were missing. Yes - they do returns, but this means re-ordering from somewhere different and waiting for the newly ordered item to arrive. Not acceptable, Amazon.